/*
* Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.errai.enterprise.client.cdi;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import jsinterop.annotations.JsType;
@JsType
public class WindowEventObservers {
private final Map<String, List<JsTypeEventObserver<?>>> observers = new HashMap<String, List<JsTypeEventObserver<?>>>();
public static WindowEventObservers createOrGet() {
if (!windowEventObserversDefined()) {
setWindowEventObservers(new WindowEventObservers());
}
return getWindowEventObservers();
}
public void add(final String eventType, final JsTypeEventObserver<?> observer) {
if (!observers.containsKey(eventType)) {
observers.put(eventType, new ArrayList<JsTypeEventObserver<?>>());
}
observers.get(eventType).add(observer);
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public void fireEvent(final String eventType, final Object evt) {
for (final JsTypeEventObserver observer : get(eventType)) {
observer.onEvent(evt);
}
}
public JsTypeEventObserver<?>[] get(final String eventType) {
if (!observers.containsKey(eventType)) {
return new JsTypeEventObserver<?>[0];
}
return observers.get(eventType).toArray(new JsTypeEventObserver[0]);
}
private static native WindowEventObservers getWindowEventObservers() /*-{
return $wnd.eventObservers;
}-*/;
private static native void setWindowEventObservers(WindowEventObservers eo) /*-{
$wnd.eventObservers = eo;
}-*/;
private static native boolean windowEventObserversDefined() /*-{
return !($wnd.eventObservers === undefined);
}-*/;
}